I've been having this problem for a while now whereby my sent messages haven't been registering in the sent folder (so I'm unable to refer back to some when I've needed to). If anyone could offer any insight as to why this could be happening I'd be much appreciative.

I thought it was just me, guess not. I thought I messed around with the setting and it happened but I really have no idea how it happened.

I have the exact same issue. Actually, the folder recorded my three first sent items, but stopped after that.

All I can say is that it should work fine.

I have been using that folder to store stuff since day one, and it was last used a week or two back with no problems.

My only gripe whilst on the subject is that my sent messages folder says I have 4 pages of mesages..... it's actually only two and the other two are blank. ^_^

You have to check the 'Add to Sent' checkbox before sending an it'll work fine. We have a code to do that automatically, but it seems to have stopped working recently. I'll look into why that may be right now.

Mine has done this as well, it stopped on January 3rd, I think, which was a little surprising.
I haven't really needed to refer back to any sent Pm's, but it was a nice feature. :(

It may have something to do with the fact I hardly ever delete messages?

Edit: Thanks, Cobb!